package org.tigris.subversion.subclipse.graph.editors;

import org.eclipse.draw2d.LightweightSystem;
import org.eclipse.draw2d.MarginBorder;
import org.eclipse.draw2d.Viewport;
import org.eclipse.draw2d.parts.ScrollableThumbnail;
import org.eclipse.draw2d.parts.Thumbnail;
import org.eclipse.gef.LayerConstants;
import org.eclipse.gef.editparts.ScalableRootEditPart;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.ui.part.Page;
import org.eclipse.ui.views.contentoutline.IContentOutlinePage;

public class OverviewOutlinePage extends Page implements IContentOutlinePage {

  private Canvas overview;
  private ScalableRootEditPart rootEditPart;
  private Thumbnail thumbnail;

  public OverviewOutlinePage(ScalableRootEditPart rootEditPart) {
    super();
    this.rootEditPart = rootEditPart;
  }

  public void addSelectionChangedListener(ISelectionChangedListener listener) {}

  public void createControl(Composite parent) {
    // create canvas and lws
    overview = new Canvas(parent, SWT.NONE);
    LightweightSystem lws = new LightweightSystem(overview);
    // create thumbnail
    thumbnail = new ScrollableThumbnail((Viewport) rootEditPart.getFigure());
    thumbnail.setBorder(new MarginBorder(3));
    thumbnail.setSource(rootEditPart.getLayer(LayerConstants.PRINTABLE_LAYERS));
    lws.setContents(thumbnail);
  }

  public void dispose() {
    if (null != thumbnail) thumbnail.deactivate();
    super.dispose();
  }

  public Control getControl() {
    return overview;
  }

  public ISelection getSelection() {
    return StructuredSelection.EMPTY;
  }

  public void removeSelectionChangedListener(ISelectionChangedListener listener) {}

  public void setFocus() {
    if (getControl() != null) getControl().setFocus();
  }

  public void setSelection(ISelection selection) {}
}
